Mody Pumps MSXP8 - Manual (Page 8)

GENERAL OVERHAUL AND OIL CHECK.
MOTORS ARE UL LISTED FOR APPLICATIONS IN CLASS 1, DIV 1, GROUPS C
& D EXPLOSION PROOF ENVIRONMENTS. ALL REPAIRS OTHER THAN LEAD
RECONNECTS AND OUTER SEAL REPLACEMENT SHALL BE PERFORMED BY AN
AUTHORIZED RELIANCE SERVICE FACILITY. ANY OTHER REPAIRS PERFORMED
BY THE END USER OR CUSTOMER NEGATES THE UL LISTING AND MOTOR
WARRANTY.
DIS-ASSEMBLY(REFER DRG.NO.DW/801/00
• IT IS MANDATORY THAT ALL "O" RINGS BE REPLACED WHENEVER A PUMP IS OVERHAULED
OR DISMANTLED. UNDER NO CIRCUMSTANCES SHOULD OLD "O" RINGS BE USED, EVEN IF
THEY SEEM O.K. BE CAREFUL NOT TO SCRATCH SEALING SURFACES. ALWAYS GREASE NEW
“O” RINGS BEFORE INSTALLATION.
• ALWAYS ISOLATE THE UNIT FROM ELECTRICAL POWER BEFORE ATTEMPTING ANY
OVERHAUL.
• THE PERMANENT INSTALLATION VERSION IS SUPPLIED WITH A SLIDING BRACKET FIXED
ON THE VOLUTE OF THE PUMP. LAY THE PUMP ON IT’S SIDE ON A BENCH OR OVER TWO
SUPPORTS.
• UNSCREW NUTS (4) AND REMOVE PUMP VOLUTE (18) FROM MOTOR FLANGE AND BACKPLATE
(5). REMOVE CAP SCREW AND LOCK WASHER (14 & 15) OR IN CASE OF 1150 RPM MOTOR
HEX NUT. SLIDE IMPELLER OF THE MOTOR SHAFT. IF THE IMPELLER IS SLIGHTLY
TIGHT USE A WOODEN MALLET TO TAP THE SAME OFF THE SHAFT. REMOVE KEY (12).
KEEP ASIDE CAREFULLY.
• THE LOWER MECHANICAL SEAL IS NOW IN VIEW. BE CAREFUL. IF THE SEAL HAS
LEAKED, THE OIL CASING MAY BE UNDER PRESSURE. USING A NOSE/CIRCLIP PLIER
REMOVE SNAP RING. THE MECH. SEAL ASSEMBLY CAN NOW BE REMOVED FROM THE SHAFT
BY HAND. BE VERY CAREFUL WITH THE SEALING SURFACES SO THAT THEY DO NOT
SUFFER DAMAGE OR GET SCRATCHED IN ANY WAY. LEAVE THE SEAL SEAT IN THE SEAL
HOUSING.
• EXAMINE IMPELLER, WEAR RING FOR WEAR. CHECK CONDITION OF OIL. IF EMULSIFIED
AND CONTAMINATED REPLACE OUTER MECHANICAL SEAL. IF OIL CHAMBER IS FULL OF
PUMPED FLUID WE RECOMMEND CHANGING BOTH MECHANICAL SEALS INNER AND OUTER.
• IF THE WEAR RING NEEDS TO BE REPLACED REMOVE CAP SCREWS (9) AND SEPARATE THE
SUCTION COVER. JACK OUT THE WEAR RING USING THE PRETHREADED BOLT HOLES AT
THE BOTTOM OF THE SUCTION COVER.